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anything over 100 on all cyl is fine and a good motor
The dry weight of a 1988 model, 115 hp Mercury outboard is 312 lbs.
The listed dry weight for a 1988 model, 70 hp Mercury outboard is 265 lbs.
108 lbs.
110
125 is the least
A 20 hp Mercury outboard, serial number OB268004 would be a 1988 model.
A 25 hp Mercury, serial number OB283551, is a 1988 year model outboard.
A 15 hp Mercury outboard, serial number OB31814B, would be a 1988 year model.
between 90-120
The spark plugs on a 1988 model, 70hp Johnson outboard, should be gapped to .030in.
A 60 hp Mercury outboard, serial number OB358007 would be a 1988 year model.